Hole saw extension cylinder tool bit



FIG. 1 is a front perspective view of a hole saw extension cylinder tool bit showing my new design;

FIG. 2 is a back perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a back perspective view thereof.

In FIG. 6, the broken lines showing of environmental structure for purposes of illustrating the hole saw extension cylinder tool bit in a condition of use.

The broken lines and the structure they depict form no part of the claimed design. 

The ornamental design for a hole saw extension cylinder tool bit, as shown and described. 